Open links on system browser

lib/constants/enums.dart

@@ -13,3 +13,14 @@ enum ReadStatus { all, unread, read }
 enum SortingType { date, title }
 
 enum SortingWay { descendant, ascendant }
+
+enum OpenLinksBrowser { integrated, browserCustomTab, systemBrowser }
+
+extension OpenLinksBrowserExtension on OpenLinksBrowser {
+  static OpenLinksBrowser? fromString(String? value) {
+    if (value == null || !OpenLinksBrowser.values.map((v) => v.toString()).contains(value)) {
+      return null;
+    }
+    return OpenLinksBrowser.values.firstWhere((e) => e.toString() == value);
+  }
+}

lib/constants/shared_preferences_keys.dart

@@ -5,4 +5,5 @@ class SharedPreferencesKeys {
   static const selectedColor = "selectedColor";
   static const useInAppBrowser = "useInAppBrowser";
   static const showFavicon = "showFavicon";
+  static const openLinksBrowser = "openLinksBrowser";
 }